Dear Czarine,
Greetings! Thank you for posting in Microsoft Community. We are happy to help you.
The message means mddprov account has removed your personal device from Azure or Intune. Though you still can see the account connected via Settings > Accounts, next time if you sign out and then sign in, your account may not be connected. You may no longer have access to your Microsoft 365 subscription related resource, for example, cannot sign in Office apps with that account, cannot use the account to log in Windows.
Given this, we sincerely recommend you go to contact your Microsoft 365 administrator and confirm whether they have removed your account from Azure or Intune, check if it's the change they made.
For reference: How do I find my Microsoft 365 admin? - Microsoft Support
Thanks for your time and cooperation! We hope you are keeping safe and well!
Sincerely,
Tina | Microsoft Community Moderator